#include "foldercontroller.h"
#include "controllers/v1/errorcontroller.h"

#include "yacreader_http_session.h"

#include "db_helper.h" //get libraries
#include "comic_db.h"

#include "folder.h"

#include "template.h"
#include "../static.h"

#include "qnaturalsorting.h"
#include "yacreader_global.h"

#include "QsLog.h"

struct LibraryItemSorter {
    bool operator()(const LibraryItem *a, const LibraryItem *b) const
    {
        return naturalSortLessThanCI(a->name, b->name);
    }
};

FolderController::FolderController() { }

void FolderController::service(HttpRequest &request, HttpResponse &response)
{
    QSettings *settings = new QSettings(YACReader::getSettingsPath() + "/YACReaderLibrary.ini", QSettings::IniFormat); //TODO unificar la creación del fichero de config con el servidor
    settings->beginGroup("libraryConfig");

    bool showlessInfoPerFolder = settings->value(REMOTE_BROWSE_PERFORMANCE_WORKAROUND, false).toBool();

    HttpSession session = Static::sessionStore->getSession(request, response, false);
    YACReaderHttpSession *ySession = Static::yacreaderSessionStore->getYACReaderSessionHttpSession(session.getId());

    response.setHeader("Content-Type", "text/html; charset=utf-8");
    response.setHeader("Connection", "close");

    //QString y = session.get("xxx").toString();
    //response.writeText(QString("session xxx : %1 <br/>").arg(y));

    Template t = Static::templateLoader->getTemplate("folder_" + ySession->getDeviceType(), request.getHeader("Accept-Language"));
    t.enableWarnings();
    QString path = QUrl::fromPercentEncoding(request.getPath()).toUtf8();
    QStringList pathElements = path.split('/');
    int libraryId = pathElements.at(2).toInt();
    QString libraryName = DBHelper::getLibraryName(libraryId);
    qulonglong folderId = pathElements.at(4).toULongLong();

    folderId = qMax<qulonglong>(1, folderId);

    QString folderName = DBHelper::getFolderName(libraryId, folderId);
    if (folderName.isEmpty()) {
        ErrorController(300).service(request, response);
        return;
    }

    if (folderId != 1)
        t.setVariable("folder.name", folderName);
    else
        t.setVariable("folder.name", libraryName);
    QList<LibraryItem *> folderContent = DBHelper::getFolderSubfoldersFromLibrary(libraryId, folderId);
    QList<LibraryItem *> folderComics = DBHelper::getFolderComicsFromLibrary(libraryId, folderId);

    //response.writeText(libraryName);

    folderContent.append(folderComics);

    qSort(folderContent.begin(), folderContent.end(), LibraryItemSorter());
    folderComics.clear();

    //qulonglong backId = DBHelper::getParentFromComicFolderId(libraryName,folderId);

    int page = 0;
    QByteArray p = request.getParameter("page");
    if (p.length() != 0)
        page = p.toInt();

    // /comicIdi/pagei/comicIdj/pagej/....../comicIdn/pagen
    //QString currentPath = session.get("currentPath").toString();
    //QStringList pathSize = currentPath.split("/").last().toInt;

    bool fromUp = false;

    QMultiMap<QByteArray, QByteArray> map = request.getParameterMap();
    if (map.contains("up"))
        fromUp = true;

    //int upPage = 0;

    if (folderId == 1) {
        ySession->clearNavigationPath();
        ySession->pushNavigationItem(QPair<qulonglong, quint32>(folderId, page));
        t.setVariable(QString("upurl"), "/");
    } else {
        if (fromUp)
            ySession->popNavigationItem();
        else //drill down or direct access
        {
            QStack<QPair<qulonglong, quint32>> path = ySession->getNavigationPath();
            bool found = false;
            for (QStack<QPair<qulonglong, quint32>>::const_iterator itr = path.begin(); itr != path.end(); itr++)
                if (itr->first == folderId) {
                    found = true;
                    break;
                }

            if (found) {
                while (ySession->topNavigationItem().first != folderId)
                    ySession->popNavigationItem();

                ySession->updateTopItem(QPair<qulonglong, quint32>(folderId, page));
            } else
                ySession->pushNavigationItem(QPair<qulonglong, quint32>(folderId, page));
        }

        QStack<QPair<qulonglong, quint32>> path = ySession->getNavigationPath();
        if (path.count() > 1) {
            QPair<qulonglong, quint32> parentItem = path.at(path.count() - 2);
            qulonglong upParent = parentItem.first;
            quint32 upPage = parentItem.second;
            t.setVariable(QString("upurl"), "/library/" + QString::number(libraryId) + "/folder/" + QString("%1?page=%2&up=true").arg(upParent).arg(upPage));
        } else
            t.setVariable(QString("upurl"), "/");
    }

    int elementsPerPage = 24;

    int numFolders = folderContent.length();
    //int numComics = folderComics.length();
    int totalLength = folderContent.length() + folderComics.length();

    //	int numFolderPages = numFolders / elementsPerPage + ((numFolders%elementsPerPage)>0?1:0);
    int numPages = totalLength / elementsPerPage + ((totalLength % elementsPerPage) > 0 ? 1 : 0);

    //response.writeText(QString("Number of pages : %1 <br/>").arg(numPages));

    if (page < 0)
        page = 0;
    else if (page >= numPages)
        page = numPages - 1;

    int indexCurrentPage = page * elementsPerPage;
    int numFoldersAtCurrentPage = qMax(0, qMin(numFolders - indexCurrentPage, elementsPerPage));

    //PATH
    QStack<QPair<qulonglong, quint32>> foldersPath = ySession->getNavigationPath();
    t.setVariable(QString("library.name"), libraryName);
    t.setVariable(QString("library.url"), QString("/library/%1/folder/1").arg(libraryId));
    t.loop("path", foldersPath.count() - 1);
    for (int i = 1; i < foldersPath.count(); i++) {
        t.setVariable(QString("path%1.url").arg(i - 1), QString("/library/%1/folder/%2").arg(libraryId).arg(foldersPath[i].first));
        t.setVariable(QString("path%1.name").arg(i - 1), DBHelper::getFolderName(libraryId, foldersPath[i].first));
    }

    if (folderContent.length() > 0) {
        t.loop("element", numFoldersAtCurrentPage);
        int i = 0;
        while (i < numFoldersAtCurrentPage) {
            LibraryItem *item = folderContent.at(i + (page * elementsPerPage));
            t.setVariable(QString("element%1.name").arg(i), folderContent.at(i + (page * elementsPerPage))->name);
            if (item->isDir()) {
                t.setVariable(QString("element%1.class").arg(i), "folder");

                if (showlessInfoPerFolder) {
                    t.setVariable(QString("element%1.image.url").arg(i), "/images/f.png");
                } else {
                    QList<LibraryItem *> children = DBHelper::getFolderComicsFromLibrary(libraryId, item->id);
                    if (children.length() > 0) {
                        const ComicDB *comic = static_cast<ComicDB *>(children.at(0));
                        t.setVariable(QString("element%1.image.url").arg(i), QString("/library/%1/cover/%2.jpg?folderCover=true").arg(libraryId).arg(comic->info.hash));
                    } else
                        t.setVariable(QString("element%1.image.url").arg(i), "/images/f.png");
                }

                t.setVariable(QString("element%1.browse").arg(i), QString("<a class =\"browseButton\" href=\"%1\">BROWSE</a>").arg(QString("/library/%1/folder/%2").arg(libraryId).arg(item->id)));
                t.setVariable(QString("element%1.cover.browse").arg(i), QString("<a href=\"%1\">").arg(QString("/library/%1/folder/%2").arg(libraryId).arg(item->id)));
                t.setVariable(QString("element%1.cover.browse.end").arg(i), "</a>");
                //t.setVariable(QString("element%1.url").arg(i),"/library/"+libraryName+"/folder/"+QString("%1").arg(folderContent.at(i + (page*10))->id));
                //t.setVariable(QString("element%1.downloadurl").arg(i),"/library/"+libraryName+"/folder/"+QString("%1/info").arg(folderContent.at(i + (page*elementsPerPage))->id));

                t.setVariable(QString("element%1.download").arg(i), QString("<a onclick=\"this.innerHTML='IMPORTING';this.className='importedButton';\" class =\"importButton\" href=\"%1\">IMPORT</a>").arg("/library/" + QString::number(libraryId) + "/folder/" + QString("%1/info").arg(folderContent.at(i + (page * elementsPerPage))->id)));
                t.setVariable(QString("element%1.read").arg(i), "");

                t.setVariable(QString("element%1.size").arg(i), "");
                t.setVariable(QString("element%1.pages").arg(i), "");
                t.setVariable(QString("element%1.status").arg(i), "");
            } else {
                t.setVariable(QString("element%1.class").arg(i), "cover");
                const ComicDB *comic = (ComicDB *)item;
                t.setVariable(QString("element%1.browse").arg(i), "");
                //t.setVariable(QString("element%1.downloadurl").arg(i),"/library/"+libraryName+"/comic/"+QString("%1").arg(comic->id));
                if (!ySession->isComicOnDevice(comic->info.hash) && !ySession->isComicDownloaded(comic->info.hash))
                    t.setVariable(QString("element%1.download").arg(i), QString("<a onclick=\"this.innerHTML='IMPORTING';this.className='importedButton';\" class =\"importButton\" href=\"%1\">IMPORT</a>").arg("/library/" + QString::number(libraryId) + "/comic/" + QString("%1").arg(comic->id)));
                else if (ySession->isComicOnDevice(comic->info.hash))
                    t.setVariable(QString("element%1.download").arg(i), QString("<div class=\"importedButton\">IMPORTED</div>"));
                else
                    t.setVariable(QString("element%1.download").arg(i), QString("<div class=\"importedButton\">IMPORTING</div>"));

                //t.setVariable(QString("element%1.image.url").arg(i),"/images/f.png");

                t.setVariable(QString("element%1.read").arg(i), QString("<a class =\"readButton\" href=\"%1\">READ</a>").arg("/library/" + QString::number(libraryId) + "/comic/" + QString("%1").arg(comic->id) + "/remote"));

                t.setVariable(QString("element%1.image.url").arg(i), QString("/library/%1/cover/%2.jpg").arg(libraryId).arg(comic->info.hash));

                t.setVariable(QString("element%1.size").arg(i), "<span class=\"comicSize\">" + QString::number(comic->info.hash.right(comic->info.hash.length() - 40).toInt() / 1024.0 / 1024.0, 'f', 2) + "Mb</span>");
                if (comic->info.hasBeenOpened)
                    t.setVariable(QString("element%1.pages").arg(i), QString("<span class=\"numPages\">%1/%2 pages</span>").arg(comic->info.currentPage).arg(comic->info.numPages.toInt()));
                else
                    t.setVariable(QString("element%1.pages").arg(i), QString("<span class=\"numPages\">%1 pages</span>").arg(comic->info.numPages.toInt()));

                if (comic->info.read)
                    t.setVariable(QString("element%1.status").arg(i), QString("<div class=\"mark\"><img src=\"/images/readMark.png\" style = \"width: 15px\"/> </div>"));
                else if (comic->info.hasBeenOpened)
                    t.setVariable(QString("element%1.status").arg(i), QString("<div class=\"mark\"><img src=\"/images/readingMark.png\" style = \"width: 15px\"/> </div>"));
                else
                    t.setVariable(QString("element%1.status").arg(i), "");

                t.setVariable(QString("element%1.cover.browse").arg(i), "");
                t.setVariable(QString("element%1.cover.browse.end").arg(i), "");
            }
            i++;
        }
    } else {
        t.loop("element", 0);
    }

    if (numPages > 1) {
        t.setCondition("pageIndex", true);

        QMap<QString, int> indexCount;

        QString firstChar;
        int xyz = 1;
        for (QList<LibraryItem *>::const_iterator itr = folderContent.constBegin(); itr != folderContent.constEnd(); itr++) {
            firstChar = QString((*itr)->name[0]).toUpper();
            firstChar = firstChar.normalized(QString::NormalizationForm_D).at(0); //TODO _D or _KD??
            bool ok;
            /*int dec = */ firstChar.toInt(&ok, 10);
            if (ok)
                firstChar = "#";
            //response.writeText(QString("%1 - %2 <br />").arg((*itr)->name).arg(xyz));
            if (indexCount.contains(firstChar))
                indexCount.insert(firstChar, indexCount.value(firstChar) + 1);
            else
                indexCount.insert(firstChar, 1);

            xyz++;
        }

        QList<QString> index = indexCount.keys();
        if (index.length() > 1) {
            t.setCondition("alphaIndex", true);

            qSort(index.begin(), index.end(), naturalSortLessThanCI);
            t.loop("index", index.length());
            int i = 0;
            int count = 0;
            int indexPage = 0;
            for (QList<QString>::const_iterator itr = index.constBegin(); itr != index.constEnd(); itr++) {
                //response.writeText(QString("%1 - %2 <br />").arg(*itr).arg(count));
                t.setVariable(QString("index%1.indexname").arg(i), *itr);
                t.setVariable(QString("index%1.url").arg(i), QString("/library/%1/folder/%2?page=%3").arg(libraryId).arg(folderId).arg(indexPage));
                i++;
                count += indexCount.value(*itr);
                indexPage = count / elementsPerPage;
            }
        } else {
            t.loop("index", 0);
            t.setCondition("alphaIndex", false);
        }

        t.loop("page", numPages);
        int z = 0;
        while (z < numPages) {

            t.setVariable(QString("page%1.url").arg(z), QString("/library/%1/folder/%2?page=%3").arg(libraryId).arg(folderId).arg(z));
            t.setVariable(QString("page%1.number").arg(z), QString("%1").arg(z + 1));
            if (page == z)
                t.setVariable(QString("page%1.current").arg(z), "current");
            else
                t.setVariable(QString("page%1.current").arg(z), "");
            z++;
        }

        t.setVariable("page.first", QString("/library/%1/folder/%2?page=%3").arg(libraryId).arg(folderId).arg(0));
        t.setVariable("page.previous", QString("/library/%1/folder/%2?page=%3").arg(libraryId).arg(folderId).arg((page == 0) ? page : page - 1));
        t.setVariable("page.next", QString("/library/%1/folder/%2?page=%3").arg(libraryId).arg(folderId).arg((page == numPages - 1) ? page : page + 1));
        t.setVariable("page.last", QString("/library/%1/folder/%2?page=%3").arg(libraryId).arg(folderId).arg(numPages - 1));
        t.setCondition("index", true);
    } else {

        t.loop("page", 0);
        t.loop("index", 0);
        t.setCondition("index", false);
        t.setCondition("pageIndex", false);
        t.setCondition("alphaIndex", false);
    }

    t.setVariable("page", QString("%1").arg(page + 1));
    t.setVariable("pages", QString("%1").arg(numPages));

    response.write(t.toUtf8(), true);
}